import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

public class warpperOBJ {

    @MyAnno(str = "Main Thread")
    public static void main(String[] args) {
        Integer i=new Integer(13);
        float f=i.floatValue();
        System.out.println(i.byteValue());

    }
}


@Retention(RetentionPolicy.CLASS)
@interface MyAnno{
    String str();
}
